Lumbar support belt



FIG. 1 is a front perspective view of a lumbar support belt embodying my new design;

FIG. 2 is a rear perspective view of the lumbar support belt illustrated in FIG. 1;

FIG. 3 is a rear perspective view of the lumbar support belt as viewed from the bottom; and,

FIG. 4 is a top plan view of the lumbar support belt. 

The ornamental design for a lumbar support belt, as shown. 